Detanning apparatus



jam. l T1924 lA-YQS@ A. LAUKHUFF v DETANNING APPARATUS Filed Aug. 17, 1923 2 Sheets-Sheet 2 IHIII Il l I EEG. Z

Patented dan. 1, i924.

stares i tirata rarest ortica.

ALFRED LAUKHUFF, OF SHOEEWOOD, WISCONSN, ASSIGNOR T0 ALBERT 0. TROSTEL, 0F MILWAUKEE, WISCONSIN.

DETANNING APPARATUS.

Application led August 17, 1923. Serial No. 657,995.

To all 'w tem t may concer/IL.'

Be it known thatl, ALFRED LAUKHUFF, a citizen of the United States, and resident of Shorewood, in the county of Milwaukee and State of lVisconsin, have invented a certain new and useful Improvement in Detanning Apparatus, of which the following is a specification. Y The invention relates to detanning apparatus and more particularly to an apparatus used in the detanning of chrome shavings or trimmingsl ln` the detanning process of chrome tanned shavings or trimmings' considerable difculty has been experienced in removing the chrome liquor in an expeditious manner and the present apparatus has been designed to overcome these diiculties'by providing a tank in which the detanning process is carried out and using screens to permit the removal of the chrome liquor without the sediment and providing a paddle wheel to keep the contents in motion past the screen so that the sediment will not clog the screen.

The invention further consists in the several features hereinafter set forth and more particularly defined by claims at the conclusion hereof.

Fig. 1 is an end view, partly in section, of an apparatus embodying the invention; Fig. 2 is a side view, partly in section, of the apparatus. l

ln the drawings, the numeral 3 designates a tiltable tank having Va semi-cylindrical bottom with tracks or rails 4': mounted on its exterior adjacent its ends, which tracks move in the grooves of spaced flanged rollers 5 mounted on base castings 6, the rollers 5 being arranged in pairs at each end of the machine to form supports for the tank. The tank is preferably tilted by power to either a charging or discharging position. For this purpose a shaft 7 is journalled adjacent one end of the machine and carries a worm 8 meshing with a worm wheel 9 secured to a shaft 10 which carries gears 11 meshing with rack gears 12 on the tank whereby the rotation of the shaft 7 will serve to drive the shaft 10 in the desired direction and through the gears 11 and 12 serve to tip the tank.

The shaft 7 has a drive pulley 13 loosely mounted thereon and adapted to be direct connected therewith through a jaw clutch 11i of well known construction operated by lever 15 and when so connected the tank will be tipped into a charging position as indicated in dotted lines in Fig. 1. lt is desirable to dump ordischarge the tank at a much slower rate and for this purpose a ratchet wheel 16 is connected to the shaft 7 and moved by a pawl 17 which is'pivoted to one arm of a pivoted lever 18, the other arm of said lever carrying a roller 19 engaging a cam 2() on the hub of the pulley 13 whereby the rotation of the pulley when it is loose on the shaft will cause the pawl to impart a step by step rotation of the shaft 7 in the opposite direction from that previously described and cause the slow tilting of the tank to discharging position. rEhe release of the pawl 17 from its ratchet stops this drive and with the clutch 14; out the tank remains in a relatively fixed position. For a quick return of the tank from charging position to upright position the drive of the belt of the pulley 13 may be reversed as will be readily understood and the tank tipped by the direct drive through the pulley 13 to the shaft 7, the clutch 14 being thrown in, and the gearing connections above described.

A paddle wheel 21, having end plates 22 and blades 23, is mounted on a shaft 24C journalled `in bearings on the top of the tank. This wheel 21 is driven in any suitable manner as by a chain 25 running over a sprocket 26 on the shaft 24. The chain is arranged to permit of driving the wheel in different positions of the tank and provision is made for taking up the slack in the chain by one of the idler sprockets 27 mounted on a yoke 28 pivoted on the shaft, the lower end of this yoke being weighted so as to cause the upper sprocket to exert a tension on the chain.

On the ends of the tank and near one side suitable grooves 29 are provided to receive the frame of a screen 30 extending longitudinally of the tank and readily removable therefrom. The paddle is arranged adjacent this screen for reasons hereinafter set forth.

Deflector members 31 are preferably secured to upper sides of the tank to take care of the splash from the paddle wheel and drain cocks or plugs 32 are provided in the tank as well as a delivery opening 33 that may be shut off by a plug 34.

solution inthe tank.

' by Letters Patent is:

When the tank is brought to its charging position the chrome shavings or trimmings are introduced therein together with the chemical used for detanning and the tank is moved to upright position where the detanning takes place. During this chemical action the contents of4 the tank may be stirred or agitated by the operation of the paddle wheel. to remove the chrome tannage from the leather shavings or trimmings and put it in When this has been accomplished the screen is set into the tank andwater from a pipe is added While the wheel 21 is rotating and the delivery passage 33 is open. The dilution with the water together with the agitation ofthe material enables the chrome liquor to be drawn oli from the tank and this drawing oli" is permitted by the screens which obstruct the passage of sediment to the delivery opening and the screens themselves are kept -clean by the action of the wheel 2l, which keeps the liquid flowing past the screen at a rapid rate so as to prevent the solid particles thereon from clogging the screen. l/Vhen the chrome liquor has been carried off the slow speed turning mechanism previously explained is put in operation and the water in the tank is run olf leaving the loose detanned material in the tank.

What I claim as new and desire to secure Vl. ln a detanning apparatus, the combination with a tank containing the material and having a drain passage above its bottom, of a stationary screen removably positioned in the tank adjacent said drain passage and an agitator adjacent the screen to prevent its clogging.

2. In a detanning apparatus the combination of a tiltable tank, power means for tilting said tank to a charging or discharging position, .said tank having a delivery opening above its bottom, a removable screen preventing the passage of sedi- The effect of the chemical action is ment to said opening, and an agitator to cause flow past the screen to prevent its clogging.

3. In a detanning apparatus, the combination with a tank containing the 'material and having a drain passage above its bottom, of a screen removably positioned in the tank adjacent said drain passage and a .revoluble paddle wheel adjacent said screen to keep the contents of the tank from clogging the screen.

4.111 av detanning apparatus, the combination Voli a tiltable tank having adelivery epening above its'bottom, a screen removably secured in the tank and preventing the passage'of sediment tol saidV opening, a paddle wheel in the 'tank to cause flow of material past said screen to-prevent its clogging, and means for driving 'said wheel. l

` 5. ln a detanning apparatus, the 'combination of a tiltable tank, high and low speed power ydrive means for tilting said tank respectively to charging and discharging positions,- said tank having a delivery opening at its discharging 'side andzabove its bottom, a screen removably 'secured in the tank to prevent passageV o'f'sedimentto said opening, a paddle wheel inthe tank to cause flow of material past said screen to prevent its clogging, and a drive for said wheel.

6. In a detanning apparatus, the combination ot a tiltable tank having aside delivery opening near its upper edge, of a screen extending longitudinally ofthe'tank and removably mounted in the ends thereof'at one side of the tank adjacent said opening, a paddle-wheel in the'tank to cause flow of materialpast:saidscreenit prevent its clogging, and means for revolvingsaid wheel. I

ALFRED LAUKHUFF. Witnesses:

MARGARET MGKENZIE, G. S. SALnNTINE. 

